I have a project that is taking an unusually long time [over 8 hours] to render. It clicks along but starts to slow around 30% and then creeps to virtually a stop at 43%. I have quit and restarted but the same sequence repeats. Is there any way to render this? I am on a mac with 4 gigs of ra, and a duo core processor. The program says the file size is about 38 megs but such files have actually rendered at much smaller sizes in the past. I am rendering a png.